INSUFFICIENT A/C PERFORMANCE AND/OR NOISY COMPRESSOR. GMC Truck Safari

SUBJECT: INSUFFICIENT A/C PERFORMANCE AND/OR NOISY COMPRESSOR CLUTCH ASSEMBLY

MODELS: 1994-95 CHEVROLET CAMARO 1994-95 PONTIAC FIREBIRD

1994-95 CHEVROLET AND GMC G/M/L MODELS

CONDITION:

SOME OWNERS MAY COMMENT ON INSUFFICIENT AIR CONDITIONING PERFORMANCE AND/OR NOISY COMPRESSOR CLUTCH ASSEMBLY.

CAUSE:

PREMATURE WEAR OF THE COMPRESSOR SHAFT SEALS. THIS WEAR WILL RESULT IN PAG OIL LEAKAGE ON THE CLUTCH DRIVE AND PULLEY, THUS CAUSING INSUFFICIENT ENGAGEMENT OF THE COMPRESSOR.

CORRECTION:

INSTALL NEW SHAFT SEAL KIT, P/N 2724954 AND CLUTCH DRIVER, P/N 6580590.

PROCEDURE -

1. RECOVER REFRIGERANT. REFER TO "REFRIGERANT RECOVERY" IN SECTION 1B OF THE SERVICE MANUAL.

2. REMOVE CLUTCH DRIVER PLATE AND HUB ASSEMBLY AS IDENTIFIED IN SECTION 1D2 OF THE SERVICE MANUAL.

3. BEFORE REMOVING THE COMPRESSOR SHAFT SEALS, THE CLUTCH PULLEY ROTOR FACE MUST BE LIGHTLY SANDED WITH 100 GRIT EMERY CLOTH TO REMOVE ANY BURNT OIL BUILD UP. ONCE THE ROTOR FACE HAS BEEN RECONDITIONED, CLEAN AREA THOROUGHLY. IF THE CLUTCH PULLEY ROTOR FACE IS BADLY DISCOLORED AND/OR DAMAGED, REPLACE COMPRESSOR ASSEMBLY.

4. REMOVE COMPRESSOR SHAFT SEALS AS IDENTIFIED IN SECTION 1D2 OF THE SERVICE MANUAL.

5. INSTALL THE NEW SHAFT SEAL KIT, P/N 2724954, AND CLUTCH DRIVER, P/N 6580590, USING THE INSTALLATION PROCEDURES IN SECTION 1D2 OF THE SERVICE MANUAL. THIS NEW SEAL KIT WILL INCLUDE OIL WICK PADS AND A SHAFT DUST SEAL ALONG WITH THE TYPICAL COMPRESSOR SEALS. FOLLOW THE DETAILED INSTRUCTIONS INCLUDED IN THE SERVICE KIT TO IDENTIFY PROPER SEAL USAGE AND SEQUENCE OF INSTALLATION.

6. EVACUATE AND RE-CHARGE THE SYSTEM AS IDENTIFIED IN SECTION 1B OF THE SERVICE MANUAL.

7. CHECK SYSTEM FOR LEAKS. REFER TO "LEAK TESTING" IN SECTION 1B OF THE SERVICE MANUAL.

PARTS INFORMATION:

P/N DESCRIPTION QUANTITY === =========== ========

2724954 SHAFT SEAL KIT, COMPRESSOR 1

6580590 CLUTCH DRIVER, COMPRESSOR 1

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION NUMBER DESCRIPTION LABOR TIME =============== =========== ==========

D4300 SEAL, SEAT AND/OR O-RING USE PUBLISHED COMPRESSOR SHAFT - REPLACE LABOR OPERATION TIME

ADD: RECONDITION CLUTCH SURFACE .1 HR

FIGURES: 00 ATTACHMENTS: 00

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.